Thinophilus poinguinimensis Grichanov, 2023

Grichanov, I. Ya., 2023, Four new species of the genus Thinophilus Wahlberg, 1844 (Diptera: Dolichopodidae) with new records and a key to species known from India and adjacent regions, Far Eastern Entomologist 472, pp. 1-17 : 11-13

Thinophilus poinguinimensis Grichanov , sp. n.

https://zoobank.org/NomenclaturalActs/ 05D95074-0A5B-4326-95E5-196DDD6E76D2

Fig. 3

TYPE MATERIAL. Holotype – ♂, India: Goa [state], Poinguinim , 14.967- 6º N, 74.085- 6º E, 14–16.II 2009, pasture, K. Tomkovich leg. ( ZMUM) . Paratypes – 2♂, same data as for holotype ( ZMUM) .

NOTE. The holotype is mounted together with paratypes on the same pin. Terminalia of the holotype (on the top of the pin) are dissected and stored in glycerin in microvial pinned with the specimens .

DESCRIPTION. MALE ( Fig. 3A ). Head ( Fig. 3B ): postcranium dark green-blue, white pollinose; frons shining blue-violet; face and clypeus blue-violet, brownish pollinose, shining under antenna; face under antennae 1.3 times as wide as height of postpedicel; clypeus 1/3 as long as epistoma, 1.9 times wider than long; palpus yellow, bearing sparse black bristly hairs; proboscis black; 2 diverging ocellars; 1 vertical, 1 postvertical, much stronger and longer than, and not in row with upper postoculars; upper postoculars uniseriate, black; middle and lower postoculars multiseriate, white, long; antenna mostly black; scape, pedicel and postpedicel orange-yellow ventrally; scape with scale-like inner projection; pedicel simple, convex on inner side; postpedicel ( Fig. 3C ) rounded, with short pubescence, slightly higher than long (14/12); arista-like stylus dorsal, black, thick basally, shortly pubescent; length ratio of scape to pedicel to postpedicel to stylus, 0.09/0.07/0.12/0.55.

Thorax: metallic, mesonotum greenish blue-violet, grey pollinose, with shining median strip and scutellum, black lateral spot at notopleura and postalar black spot; pleura weakly pollinose; no acrostichals; 6 dorsocentrals decreasing greatly in length anteriorly; scutellum with 2 strong marginals and 2 hair-like laterals; 2–3 upper and 2–3 lower, black propleural bristles of different length.

Legs: coxae black, yellow at apex; legs mostly yellow; fore tibia dark at apex; tarsi gradually darkened toward segment 5. Fore leg. Coxa with short brown and black setae, longer at apex; femur slightly swollen in basal half, with two ventral rows of fine blackish hair-like setae, longer in distal half, at most as long as femur height; tibia bearing 2 anterodorsal, 2 posterodorsals; tarsus simple with tarsomere 5 slightly widened, with elongate apicodorsal setulae; length of femur, tibia and tarsal segments (in mm): 0.93/0.91/0.36/0.17/0.12/0.09/0.13. Mid leg. Coxa with short brown and black setae; femur with two ventral rows of black setae, longer in distal half, about as long as femur height; tibia bearing 2 anterodorsal, 2 posterodorsal, 2 antero- and posteroventral bristles at distal 1/4, 4 apicals; tarsomere 5 inconspicuously thickened; length of femur, tibia and tarsal segments (in mm): 1.21/1.21/0.62/0.29/0.19/0.13/0.16. Hind leg. Coxa with 1 black exterior bristle; femur with 2 ventral rows of very short hair-like setae; tibia bearing 2 anterodorsal, 2 posterodorsal bristles, ventral row of 10–12 setae, as long as or slightly longer than width of tibia, 3 apicals; tarsomere 5 inconspicuously widened; length of femur, tibia and tarsal segments (in mm): 1.37/ 1.48/0.41/0.34/0.22/0.13/0.16.

Wing ( Fig. 3D ): almost hyaline, without dark shades; veins yellow-brown, more yellowish at base; distal part of M1+2 convex; tip of R 4+5 parallel with M1+2; ratio of part of costa between R 2+3 and R 4+5 to that between R 4+5 and M1+2 (in mm), 0.36/0.22; crossvein dm-m straight; ratio of dm-m to distal part of M4, 0.28/0.4; anal vein weak; halter yellow; lower calypter yellow, with brownish cilia.

Abdomen: mostly shining blue-violet, grey dusted laterally; setae and hind-marginal bristles on tergites black, short; sternites with short setae; sternite 5 with 2 groups of microspinules. Hypopygium ( Fig. 3E ) black with yellow cercus; epandrial lobe reduced; hypandrium fused with epandrium, short and broad, apically concave; phallosoma broad, narrow at apex, reaching apex of surstyli; phallus long, simple; surstylus ( Fig. 3F ) almost straight and broad (lateral view), narrow at apex, with 2 long dorsal bristles and several short ventral and apical setae; cerci dorsally adjoined, leaf-like, with long marginal bristles ( Fig. 3G ).

MEASUREMENTS. Body length 3.4 mm; antenna length 0.7 mm; wing length 3.2 mm; wing width 1.1 mm.

FEMALE. Unknown.

DIAGNOSIS. Thinophilus poinguinimensis sp. n. is remarkable in its antenna mostly black, and propleural bristles black; mesonotum with shining median strip and scutellum, black lateral spot at notopleura and postalar black spot. It keys to pectinipes De Meijere, 1916 , integer Becker, 1922, peninsularis Parent, 1935 and puniamoorthyae Grootaert, 2018 ( Yang et al., 2011; Samoh et al., 2017; Grootaert, 2017, 2018), well differing from these species in the morphology of hypopygium and above mentioned characters.

ETYMOLOGY. The species is named after the village in the Indian state of Goa, near the Goa-Karnataka border, and close to the Cotigao Wildlife Sanctuary, where the type was collected.

Figures

Fig. 3. Thinophilus poinguinimensis sp. n. (holotype): A – habitus; B – head; C – antenna; D – wing; E – hypopygium, lateral view, after maceration; F – phallosoma and surstylus, ventral view; G – cerci, dorsal view.